ZR-DJYPVR Flexible Individual Shield Computer Cable | Flame Retardant Twisted

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• ZR-DJYPVR: Standard flame-retardant, individually shielded, flexible computer cable; suitable for fixed and mobile installation in environments with moderate electromagnetic interference.
• NH-ZR-DJYPVR: Flame-retardant and fire-resistant type; suitable for backup circuits for fire emergency instrumentation signals.
• WDZ-ZR-DJYPVR: Low-smoke, zero-halogen (LSZH), flame-retardant type; suitable for subways, hospitals, underground utility tunnels, and enclosed public buildings.
• ZR-DJYPVR22: Steel-tape armored type; offers crush resistance and rodent protection; suitable for concealed wall installation and cable trench laying.

• Flexible conductor: High-purity oxygen-free annealed copper, Class 5 stranded structure, copper purity ≥99.95%; common cross-sections: 0.5mm², 0.75mm², 1.0mm², 1.5mm², 2.5mm².
• Extruded PE insulation: Uniform wall thickness, extremely low dielectric loss, and stable insulation resistance; effectively suppresses signal phase deviation over long distances.
• Optimized twisted-pair structure: Fixed-pitch twisting design; scientifically reduces mutual inductive interference between the two cores of a single signal circuit.
• Individual copper braid shielding: Shielding coverage ≥85%; each signal pair features an independent shield to isolate internal crosstalk.
• Wrapping tape: Envelops all shielded pairs to prevent core displacement during cabling and sheath extrusion.
• Non-hygroscopic PP filler: Fills gaps between pairs to create a uniform circular cable profile, enhancing crush resistance and structural stability.
• Flame-retardant PVC outer sheath: Modified flame-retardant formula; resistant to aging, moisture, oil, and mild acid/alkali corrosion; inhibits flame spread during fire incidents.

• Rated operating voltage: U0/U = 300/500V; specifically designed for low-current instrumentation and computer signal circuits
• Power-frequency withstand voltage test: 1500V; no insulation breakdown after 5 minutes
• DC conductor resistance at 20°C: Fully compliant with GB/T 3956 standards; strictly controlled to limit voltage drop during long-distance signal transmission
• Insulation resistance: ≥200 MΩ·km at ambient temperature; ensures an adequate safety margin for long-term continuous operation
• Mutual capacitance between cores: ≤120 pF/m; effectively controls signal attenuation for 4–20mA analog signals and RS485 digital communication signals
• Individual core shielding effectiveness: ≥75 dB; suppresses moderate-intensity 50Hz power-frequency interference and low-frequency electromagnetic radiation interference

• Permissible long-term continuous operating temperature: -15°C to +70°C
• Minimum ambient temperature for fixed installation: ≥0°C; prevents sheath embrittlement or cracking during bending/installation
• Minimum temperature for mobile installation: -15°C; suitable for wiring environments involving equipment subject to long-term vibration
• Flame retardancy rating: Complies with GB/T 18380 Category C vertical flame spread test requirements; slow flame propagation rate prevents fire from spreading along the cable run
• Storage temperature range: -20°C to +50°C; prolonged exposure to rain or direct UV radiation is strictly prohibited

• Minimum bending radius (fixed installation): ≥ 8 × cable outer diameter
• Minimum bending radius (frequent flexing/movement): ≥ 12 × cable outer diameter
• Bending fatigue characteristics: Passed repeated bending cycle tests; conductors remain intact without breakage after thousands of reciprocating flexes
• Standard pair configurations: 1×2, 2×2, 3×2, 4×2, 6×2, 8×2, 10×2, 12×2, 16×2, 24×2, 37×2; custom non-standard pair counts available upon request based on specific drawings
• Structural design: Features individual pair shielding only (no overall shield); a cost-optimized solution for environments with moderate interference

1. Flexible Class 5 conductors overcome cabling limitations in mobile and high-vibration environments (Unique core advantage)

   Traditional rigid DJYPV cables utilize Class 2 solid or semi-rigid conductors suitable only for one-time fixed installation; repeated flexing often leads to conductor breakage and intermittent signal failures. In contrast, the ZR-DJYPVR employs a stranded flexible conductor structure that withstands cyclic bending, torsion, and mechanical vibration. It is ideally suited for cabling involving frequent cabinet door movement, robotic drag-chain applications, and instrumentation connections near vibration sources such as pumps and fans, thereby significantly reducing the risk of hidden circuit failures for contractors after project commissioning.

2. Individual pair shielding effectively suppresses inter-loop crosstalk

   Each twisted signal pair features an independent braided copper shield, effectively isolating signals from adjacent data acquisition loops when cables are densely installed in cable trays. In multi-channel systems for the simultaneous acquisition of temperature, pressure, and flow data, this design significantly mitigates signal drift and data fluctuation issues compared to control cables using only an overall shield, thereby shortening the on-site system commissioning period.

3. Inherent flame-retardant properties reduce compliance risks in fire zone design

   The outer sheath utilizes a flame-retardant modified formulation that automatically inhibits sustained combustion when exposed to open flames, meeting basic fire-safety wiring requirements for facilities such as factory workshops, commercial buildings, and chemical plants. No additional flame-retardant coating is required during installation, facilitating successful fire safety inspections and avoiding costs associated with remedial work.

4. Cost-Effective Solution for Moderate Interference Conditions

   In environments with moderate interference, using ZR-DJYPVPR cables—which feature a dual-shielding structure (individual plus overall shielding)—results in unnecessary shielding costs, whereas standard unshielded control cables fail to guarantee signal stability. The ZR-DJYPVR cable employs a single-layer individual shielding design that precisely meets anti-interference requirements; it ensures accurate signal transmission while effectively controlling total procurement costs, thereby increasing the overall profit margin for the general contractor.

5. PE Insulation Ensures Long-Term Signal Transmission Stability

   Polyethylene (PE) insulation material is characterized by a low dielectric constant and low capacitance. Its performance in long-distance signal transmission is far superior to that of PVC-insulated control cables, effectively minimizing signal latency and distortion. When installed according to standard specifications, these cables have a design service life of up to 25 years, thereby reducing costs for project owners and investors associated with periodic cable replacement and system upgrades.

• Instrumentation systems subject to moderate interference in the petrochemical and refining industries

  Cables for pressure, temperature, and flow transmitters; multi-channel signal acquisition cables for DCS (Distributed Control Systems); auxiliary monitoring signal cables for reaction vessels; and intrinsically safe signal loop wiring in areas with moderate interference.

• Automated production lines in the packaging, food processing, and light industry sectors

  Signal connection cables for PLC I/O modules; wiring for proximity switches and photoelectric sensors; instrument signal lines for conveyor belt vibration monitoring; wiring for movable sections of control cabinet doors; and signal loops subject to moderate interference for small variable-frequency drive (VFD) peripherals.

• Intelligent building and central air conditioning control systems

  Wiring for temperature and humidity sensing in centralized AC control; operation feedback signal cables for ventilation fans; multi-circuit centralized signal acquisition cables for basement equipment rooms; and low-current signal transmission loops for auxiliary fire safety monitoring.

• Wastewater Treatment and Environmental Monitoring Station Project

  Signal connection cables for water quality probes; transmission cables for liquid level and flow sensors; signal wiring from field detection terminals to control cabinets; and cabling for outdoor semi-fixed vibration equipment.

• Municipal Utility and Small-Scale Pumping Station Automation

  Signal cables for automated monitoring of small pumping stations; wiring for community environmental monitoring instruments; sensor cables for roadside auxiliary detection; and low-interference low-voltage circuits for municipal automation control.

Moderate electromagnetic interference generated by multiple medium-power motors and small variable frequency drives (VFDs) on-site; some instrument cables routed over vibrating pump bases, where rigid cables were prone to core wire breakage during long-term operation; workshop fire safety regulations required basic flame-retardant properties.

ZR-DJYPVR 4×2×0.75mm² and ZR-DJYPVR 8×2×1.0mm² flexible individually shielded cables; total supply volume: 156,200 meters.

Post-installation, 4–20mA signal transmission across all measurement points remained stable; no conductor breakage or signal drift occurred during two years of continuous operation; successfully passed the plant's electrical and fire safety inspections, earning unanimous approval from the automation design institute and the construction contractor.

Cabling for production line control cabinet doors subject to frequent opening/closing and for sensors mounted on moving cable carriers; prevention of signal jitter caused by adjacent power cables; and a requirement for a cost-effective shielding solution.

Custom-specified, bend-resistant cables (ZR-DJYPVR 2×2×0.5mm² and 6×2×0.75mm²) were procured for the sensor circuits, with a total order volume of 62,800 meters.

Signal fluctuations were completely eliminated, and equipment failure rates dropped significantly; material costs were reduced by 23% compared to a solution using double-shielded ZR-DJYPVPR cables; and the solution received approval from the factory's maintenance and electrical management departments.

• JB/T 8734.5: Electric wires and cables for electrical equipment
• GB/T 12666: Test methods for wires and cables under fire conditions
• GB/T 3956: Conductors of cables
• Equivalent to BS5308 (International design specification for computer cables)

• CCC (China Compulsory Certification) for standard industrial and civil-use products
• CE certification (Compliance with EU Low Voltage Directive 2014/35/EU)
• ISO 9001 (Quality Management System), ISO 14001 (Environmental Management System), and ISO 45001 (Occupational Health and Safety Management System) certifications
• Provision of factory inspection reports, raw material traceability certificates, and electrical and shielding performance test reports with each batch
• Provision of customizable IEC standard test documentation and certification materials for local market tender registration, based on the client's region

• Rigorous incoming material inspection to eliminate potential quality issues in later project stages

  All raw materials—including copper rods, PE granules, and flame-retardant PVC—are sourced from large, reputable manufacturers with full qualifications. Prior to production, comprehensive inspections are conducted on copper purity, insulation melt flow rate, braided shielding density, and the consistency of flame-retardant properties. The use of recycled copper and substandard recycled plastics is strictly prohibited, effectively preventing issues such as excessive conductor resistance, sheath cracking, inadequate shielding effectiveness, and failure of flame-retardant performance; this helps buyers mitigate risks associated with project rework, rectification, and compensation claims caused by non-compliant cables.

• Flexible customization to meet specific project technical requirements

  Supports customization of conductor cross-sections and non-standard pair counts, as well as structural enhancements such as armoring, flame retardancy, low-smoke zero-halogen (LSZH) properties, and fire resistance. Sheath colors, surface print details, and meter-marking formats can be tailored to client construction drawings and tender specifications. Sample reels are available for preliminary bending and shielding performance testing, enabling design institutes and engineering firms to validate the product prior to formal bidding.

• Direct-from-factory model to maximize project gross margins

  Eliminates intermediary markups; unit prices are negotiable for large-scale project orders; reasonable Minimum Order Quantities (MOQs) are set to accommodate the purchasing needs of small-to-medium-sized automation and electrical contractors. Offers consolidated shipping solutions (LCL) for large-volume overseas buyers to reduce overall ocean freight and logistics costs.

• Comprehensive, full-lifecycle technical support for electrical engineers

  Our expert electrical engineering team provides services including product selection advice, shielding solution comparisons, optimization of mobile installation plans, and the drafting of technical specifications for tenders.

  We supply official technical datasheets, cable dimension drawings, and operational guidelines for on-site bending and grounding to facilitate drawing reviews and approval processes.

  Production progress is transparent and trackable; comprehensive electrical performance testing is conducted prior to shipment to ensure the timely delivery of orders for urgent tender projects.

  We offer remote technical consultation to assist in resolving installation and troubleshooting issues for overseas automation projects.

• Export-compliant packaging and complete documentation for customs clearance

  We utilize export-grade wooden cable reels featuring internal moisture-proof wrapping and external impact protection, ensuring suitability for long-distance, cross-border sea and land transport. Packing lists, commercial invoices, certificates of origin, and other clearance documents are provided to streamline the export declaration process for international buyers.

• Shield Grounding Specifications: For signal cables with individual pair shielding, standard installation requires single-end grounding; grounding at both ends is strictly prohibited to prevent potential differences in the ground loop from inducing additional interference signals. We can provide specific grounding installation guidelines upon customer request.
• Bending Radius Compliance: Strictly distinguish between the bending radius requirements for fixed installation and mobile installation; excessive or repeated bending at small radii accelerates fatigue fracture in flexible conductors, potentially leading to intermittent signal issues during operation.
• Selection and Matching Principles: Clearly distinguish between the three product types—ZR-DJYPVR (flexible, individual pair shielding only) is suitable for mobile cabling in environments with moderate interference; DJYPV (rigid) is suitable for fixed cabling with individual pair shielding; ZR-DJYPVPR (flexible, dual shielding with individual pair and overall shields) is suitable for environments with strong electromagnetic interference. Avoid over-specification or inadequate shielding design during selection.
• Separation requirements for installation: When laid parallel to AC power cables, a safe clearance distance must be maintained in accordance with electrical design standards; for high-power cables laid in close proximity, the use of partitioned cable trays is recommended to maximize effective shielding and interference suppression.
• Direct burial guidelines: Standard unarmored ZR-DJYPVR cables are not suitable for direct burial; if direct burial is required in environments posing risks of mechanical crushing or rodent damage, the steel-tape armored version (ZR-DJYPVR22) should be selected.
• Storage management standards: Finished cable reels should be stored in a dry, well-ventilated warehouse; avoid prolonged exposure to rain and direct sunlight to minimize sheath degradation and extend shelf life.
• Voltage limitations: This product is a specialized signal cable rated for 300/500V; it is strictly prohibited for use in main power transmission lines to prevent insulation breakdown caused by overloading.

If you are working on an automation and instrumentation project and require a quote, technical specifications, customization details, or expert advice on cable selection and mobile installation solutions for the ZR-DJYPVR cable, please submit your request via the inquiry form on our website. Please be sure to specify the number of pairs, conductor cross-sectional area, total order quantity, specific type (e.g., armored, LSZH, fire-resistant), and the destination country. Our professional cable engineering team will provide a tailored technical solution and a highly competitive quote within 24 business hours. We warmly welcome the opportunity to establish long-term partnerships with electrical contractors, automation system integrators, instrumentation distributors, and architectural design institutes worldwide.